We report a measurement of the CP-violation parameter φ1 obtained in a time-dependent analysis of B⁰→D⁽*⁾⁰h⁰ decays followed by D⁰→K⁰s π+π− decay. A model-independent measurement is performed using the binned Dalitz plot technique. The measured value is φ1=11.7°±7.8°(stat)±2.1°(syst). Treating sin2φ1 and cos2φ1 as independent parameters, we obtain sin2φ1=0.43±0.27(stat)±0.08(syst) and cos2φ1=1.06±0.33(stat)+0.21 −0.15(syst). The results are obtained with a full data sample of 772×10^6 BB pairs collected near the Υ(4s) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider.
Measurement of the CKM angle φ₁ in B⁰→D⁽*⁾⁰h⁰, D⁰→K⁰sπ+π− decays with time-dependent binned Dalitz plot analysis
F. Tenchini;
2016-01-01
Abstract
We report a measurement of the CP-violation parameter φ1 obtained in a time-dependent analysis of B⁰→D⁽*⁾⁰h⁰ decays followed by D⁰→K⁰s π+π− decay. A model-independent measurement is performed using the binned Dalitz plot technique. The measured value is φ1=11.7°±7.8°(stat)±2.1°(syst). Treating sin2φ1 and cos2φ1 as independent parameters, we obtain sin2φ1=0.43±0.27(stat)±0.08(syst) and cos2φ1=1.06±0.33(stat)+0.21 −0.15(syst). The results are obtained with a full data sample of 772×10^6 BB pairs collected near the Υ(4s) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider.File in questo prodotto:
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